More specific document
Switch to SVG to PNG that make hosting easy by github
Make executable
Make test simple to human readable
Fix test procedure
Merge pull request #56 from Kuniwak/more-doc

More specific document
Make invalid severity tolerance
Merge pull request #57 from Kuniwak/tolerant-severity

Make invalid severity tolerance
Care line jump command
Fix submodule status
Merge pull request #59 from Kuniwak/fix-vital-fall

Care line jump command
Merge branch 'master' into unify-log-format